Ecc International Limited

Imerys Pigments, Inc.

Anglo-american Clays Corporation

Anthony Allan May

Dickey S Shurling

Christopher R L Golley

William L Garforth

Bomi M Bilimoria

Ronald Windell Andrews

Teresa Anderson Rhodes

Ronald Wayne Underwood

David Andrew Greenhill

Connie Carol Brown

Method of treating an aqueous suspension of kaolin

An improvement is disclosed applicable to the method for producing a calcined kaolin by the steps of wet beneficiating a crude kaolin to form a slurry of the beneficiated kaolin; dewatering the slurry to form a substantially dry calciner feed; and calcining the feed at a temperature of at least 1450.degree. F. by passing a stream of hot gases through a calciner in which the kaolin feed is resident, whereby an exhaust stream of hot gases is generated which entrains quantities of partially calcined and hydrous kaolin pigment fines. The improvement, enabling useful application of the kaolin pigment fines, comprises recovering the kaolin pigment fines from the exhaust stream for use in papermaking. The fines can be recovered at a wet scrubber, and after being partially dewatered, shipped directly as a product slurry to the paper maker.

Method for producing high opacifying kaolin pigment

Aliphatic complex phosphate esters or salts thereof, of a non-ionic surface active compound, are utilized together with aliphatic fatty acids as collector agents during flotation for removing titanium-based impurities from kaolin clays in a froth flotation process.

Beneficiation of clays by froth flotation

Growing community of inventors

Sandersville, GA, United States of America

Anthony Allan May